Potosi is a village in Grant County, Wisconsin, United States. The population was 711 at the 2000 census. The village is in the Town of Potosi. Known as "the Catfish Capitol of Wisconsin," the village holds an annual Catfish Festival and Fireman's Fish Fry, typically on the 2nd weekend of August. The event includes a truck and tractor pull, beanbag and a euchre tournament, fireworks, live music, a parade, and the fish fry. The National Brewery Museum and Library opened in the village on the site of the Potosi Brewery in 2008. The museum features historic beer and brewing memorabilia, including signs, advertisements, bottles, cans, and miscellaneous paraphernalia.